APA-referens (7:e uppl.)

Chang, K. (2008). Introduction to geographic information systems (4th ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. Boston ; New Delhi: McGraw-Hill, 2008.

MLA-referens (8:e uppl.)

Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. McGraw-Hill, 2008.